set-2

51. Hardwired control unit is implemented by:

1. Software routines

2. Stacks

3. Logic circuits

4. Registers

Show me the answer

Answer: 3. Logic circuits

Explanation:

• A hardwired control unit is implemented using logic circuits to generate control signals directly.

52. Control unit operation is performed:

1. Hardwired control only

2. Micro program control only

3. Hardwired or micro program control

4. None of the above

Show me the answer

Answer: 3. Hardwired or micro program control

Explanation:

• The control unit can be implemented using either hardwired control or micro program control.

53. Micro instructions are stored in the:

1. Internal storage

2. Cache

3. External storage

4. Control memory

Show me the answer

Answer: 4. Control memory

Explanation:

• Micro instructions are stored in control memory, which is part of the control unit.

54. The registers are essential to instruction execution:

1. Program counter

2. Memory buffer register

3. Instruction register

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• Registers such as the program counter, memory buffer register, and instruction register are essential for instruction execution.

55. In immediate addressing the operand is placed:

1. In the CPU register

2. After op-code in the instruction

3. In the memory

4. In the stack

Show me the answer

Answer: 2. After op-code in the instruction

Explanation:

• In immediate addressing, the operand is part of the instruction itself and is placed immediately after the op-code.

56. The most common addressing technique employed by a CPU is:

1. Immediate

2. Indirect

3. Direct

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• CPUs use various addressing techniques, including immediate, indirect, and direct addressing, depending on the instruction.

57. CPU does not perform the operation:

1. Data transfer

2. Arithmetic operation

3. Logic operation

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• The CPU performs data transfer, arithmetic operations, and logic operations as part of its normal functioning.

58. Branch instructions are used to:

1. Manipulate numeric data

2. Transfer control

3. Logical data

4. Manage data

Show me the answer

Answer: 2. Transfer control

Explanation:

• Branch instructions are used to transfer control to a different part of the program based on certain conditions.

59. Arithmetic instructions provide:

1. Data processing capabilities

2. Computational capabilities

3. Data storage capabilities

4. Control capabilities

Show me the answer

Answer: 2. Computational capabilities

Explanation:

• Arithmetic instructions enable the CPU to perform mathematical computations such as addition, subtraction, multiplication, and division.

60. The ALU of a central processing unit does the essential math work for the computer. What does the control unit do?

1. Communicates its results

2. Activates the output device

3. Monitors the flow of information

4. Control the printer

Show me the answer

Answer: 3. Monitors the flow of information

Explanation:

• The control unit manages and coordinates the flow of data and instructions within the CPU and between the CPU and other components.

61. Which type of computers use the 8-bit code called EBCDIC?

1. Minicomputers

2. Mainframe

3. Microcomputers

4. Supercomputers

Show me the answer

Answer: 2. Mainframe

Explanation:

• EBCDIC (Extended Binary Coded Decimal Interchange Code) is primarily used in IBM mainframe computers.

62. The ALU of a computer responds to the commands coming from:

1. Primary memory

2. External memory

3. Control section

4. Cache memory

Show me the answer

Answer: 3. Control section

Explanation:

• The ALU (Arithmetic Logic Unit) executes commands issued by the control unit, which is part of the control section.

63. The microprocessor of a computer cannot operate on any information if that information is not in its:

1. Secondary storage

2. ALU

3. Main storage

4. Logic unit

Show me the answer

Answer: 3. Main storage

Explanation:

• The microprocessor can only operate on data that is loaded into the main memory (RAM).

64. Who coordinates the sequencing of events within the central processor or computer?

1. Logic unit

2. Register unit

3. Arithmetical unit

4. Control unit

Show me the answer

Answer: 4. Control unit

Explanation:

• The control unit coordinates the sequencing of events and operations within the CPU.

65. A computer program that converts an entire program into machine language at one time is called a/an:

1. Interpreter

2. Compiler

3. Simulator

4. Commander

Show me the answer

Answer: 2. Compiler

Explanation:

• A compiler translates the entire source code of a program into machine language in one go.

66. What is meant by a dedicated computer?

1. Which is used by one person only

2. Which is assigned one and only one task

3. Which does one kind of software

4. Which is meant for application software only

Show me the answer

Answer: 2. Which is assigned one and only one task

Explanation:

• A dedicated computer is designed to perform a specific task or function.

67. A complete microcomputer system consists of:

1. Microprocessor

2. Peripheral equipment

3. Memory

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• A complete microcomputer system includes a microprocessor, memory, and peripheral equipment.

68. Which major development led to the production of microcomputers?

1. Magnetic tapes

2. Logic gates

3. Floppy disks

4. Integrated circuits

Show me the answer

Answer: 4. Integrated circuits

Explanation:

• The development of integrated circuits (ICs) enabled the miniaturization of computer components, leading to the production of microcomputers.

69. The word size of a microprocessor refers to:

1. The amount of information that can be stored in a byte

2. The amount of information that can be stored in a cycle

3. The number of machine operations performed in a second

4. The maximum length of an English word that can be input to a computer

Show me the answer

Answer: 2. The amount of information that can be stored in a cycle

Explanation:

• The word size of a microprocessor refers to the number of bits it can process in a single cycle.

70. One computer that is not considered a portable computer is:

1. Minicomputer

2. Notebook computer

3. Laptop computer

4. All of the above

Show me the answer

Answer: 1. Minicomputer

Explanation:

• Minicomputers are not portable; they are larger and designed for multi-user environments.

71. Which of the following require large computer memory?

1. Imaging

2. Voice

3. Graphics

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• Imaging, voice, and graphics processing all require large amounts of memory to store and process high-resolution images, audio data, and complex graphical elements.

72. A computer enthusiast is:

1. User friendly

2. Computer

3. A hacker

4. All of the above

Show me the answer

Answer: 3. A hacker

Explanation:

• A computer enthusiast is often referred to as a hacker, someone who is deeply interested in computers and programming.

73. Most of the inexpensive personal computers do not have any disk or diskette drive. What is the name of such computers?

1. Home computers

2. Dedicated computers

3. Diskless computers

4. None of the above

Show me the answer

Answer: 1. Home computers

Explanation:

• Home computers, especially older or budget models, often lacked disk or diskette drives and relied on other storage methods like cassettes or cartridges.

74. A computer has no more sense than a light

1. Bulb

2. Switch

3. Pen

4. Pad

Show me the answer

Answer: 2. Switch

Explanation:

• A computer, like a switch, operates based on inputs and outputs but does not have inherent "sense" or understanding.

75. How many address lines are needed to address each memory locations in a 2048x4 memory chip?

1. 10

2. 8

3. 11

4. 12

Show me the answer

Answer: 3. 11

Explanation:

• A 2048x4 memory chip has 2048 memory locations. To address 2048 locations, you need 11 address lines because (2^{11} = 2048).

76. The stack pointer in the 8085 microprocessor is a

1. 16-bit register that points to stack memory locations

2. 16-bit accumulator

3. Memory locations in the stack

4. Flag register used for the stack

Show me the answer

Answer: 1. 16-bit register that points to stack memory locations

Explanation:

• The stack pointer in the 8085 microprocessor is a 16-bit register that holds the address of the top of the stack in memory.

77. Which of the following registers is used to keep track of address of the memory location where the next instruction is located?

1. Memory address register

2. Instruction register

3. Memory data register

4. Program counter

Show me the answer

Answer: 4. Program counter

Explanation:

• The program counter (PC) holds the address of the next instruction to be executed in memory.

78. Which of the following registers is loaded with the content of memory location pointed by the PC?

1. Memory address register

2. Instruction register

3. Memory data register

4. Program counter

Show me the answer

Answer: 2. Instruction register

Explanation:

• The instruction register (IR) is loaded with the content of the memory location pointed to by the program counter (PC), which is the next instruction to be executed.

79. In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of a register?

1. Absolute mode

2. Immediate mode

3. Indirect mode

4. Index mode

Show me the answer

Answer: 4. Index mode

Explanation:

• In index addressing mode, the effective address is calculated by adding a constant value (index) to the contents of a register.

81. Super computers are primarily useful for

1. Input-output intensive processing

2. Data-retrieval operations

3. Mathematical-intensive scientific applications

4. All of the above

Show me the answer

Answer: 3. Mathematical-intensive scientific applications

Explanation:

• Supercomputers are designed for high-performance tasks, particularly those involving complex mathematical calculations and simulations, such as weather forecasting, nuclear research, and scientific modeling.

82. The heart of any computer is the

1. CPU

2. I/O units

3. Memory

4. Disks

Show me the answer

Answer: 1. CPU

Explanation:

• The CPU (Central Processing Unit) is often referred to as the "heart" of the computer because it performs the majority of processing tasks and controls other components.

83. The central processing unit (CPU) consists of:

1. Input, output and processing

2. Control unit, primary storage, and secondary storage

3. Control unit, arithmetical logic unit, and primary storage

4. None of the above

Show me the answer

Answer: 3. Control unit, arithmetical logic unit, and primary storage

Explanation:

• The CPU consists of the control unit (CU), arithmetic logic unit (ALU), and primary storage (registers), which work together to execute instructions.

84. Which is not an input device?

1. CRT

2. Optical scanners

3. Voice recognition

4. COM (Computer Output Microfilm)

Show me the answer

Answer: 4. COM (Computer Output Microfilm)

Explanation:

• COM (Computer Output Microfilm) is an output device used to store data on microfilm, not an input device.

85. The ascending order of a data hierarchy is:

1. Bit-bytes-field-record-file-database

2. Bytes-bit-fields-record-file-database

3. Bit-bytes-record-field-file-database

4. Bytes-bit-record-fields-file-database

Show me the answer

Answer: 1. Bit-bytes-field-record-file-database

Explanation:

• The data hierarchy starts from the smallest unit (bit) and progresses to larger units like bytes, fields, records, files, and finally databases.

86. What is the control unit's function in the CPU?

1. To transfer data to primary storage

2. To store program instruction

3. To perform logic operations

4. To decode program instructions

Show me the answer

Answer: 4. To decode program instructions

Explanation:

• The control unit (CU) decodes instructions fetched from memory and coordinates the execution of these instructions by sending signals to other parts of the CPU.

87. The most common input device used today is

1. Motherboard

2. Scanner

3. Track ball

4. Keyboard

Show me the answer

Answer: 4. Keyboard

Explanation:

• The keyboard is the most widely used input device for entering text and commands into a computer.

88. Which is not a factor when categorizing a computer?

1. Speed of the output device

2. Amount of main memory the CPU can use

3. Cost of the system

4. Where is was purchased

Show me the answer

Answer: 4. Where is was purchased

Explanation:

• The location of purchase is not a factor in categorizing a computer. Factors like speed, memory, and cost are more relevant.

89. Which is not true for primary storage?

1. Information must be transferred to primary storage

2. It is relatively more expensive

3. It allows very fast access to data

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• All the statements are true for primary storage (e.g., RAM), which is fast, expensive, and requires data to be transferred to it for processing.

90. Which is the most powerful type of computer?

1. Microcomputer

2. Mainframe computer

3. Minicomputer

4. Super computer

Show me the answer

Answer: 4. Super computer

Explanation:

• Supercomputers are the most powerful computers, designed for high-performance tasks like scientific simulations and complex calculations.

91. Which kind of storage device can be carried around?

1. Floppy disk

2. System cabinet

3. Hard disk

4. Hard disk drive

Show me the answer

Answer: 1. Floppy disk

Explanation:

• Floppy disks are portable storage devices that can be easily carried around, unlike system cabinets or hard disk drives.

92. Which kind of devices allows the user to add components and capabilities to a computer system?

1. System board

2. Input devices

3. Storage devices

4. Expansion slots

Show me the answer

Answer: 4. Expansion slots

Explanation:

• Expansion slots on the motherboard allow users to add additional components like graphics cards, network cards, and other peripherals to enhance the system's capabilities.

93. Group of instructions that direct a computer is called

1. Storage

2. Logic

3. Memory

4. Program

Show me the answer

Answer: 4. Program

Explanation:

• A program is a set of instructions that directs a computer to perform specific tasks.

94. The basic components of a modern digital computer are:

1. Input device

2. Central processing unit

3. Output device

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• A modern digital computer consists of input devices, a central processing unit (CPU), and output devices, among other components.

95. A collection of eight bits is called:

1. Byte

2. Record

3. Word

4. File

Show me the answer

Answer: 1. Byte

Explanation:

• A byte is a unit of digital information that consists of 8 bits.

96. Processor of all computer, whether micro, mini or mainframe must have

1. ALU

2. Control unit

3. Primary storage

4. All of the above

Show me the answer

Answer: 4. All of the above

Explanation:

• All processors, regardless of the type of computer, must have an Arithmetic Logic Unit (ALU), a control unit, and primary storage (registers) to function.

97. Where does a computer add and compare data?

1. Hard disk

2. CPU chip

3. Floppy disk

4. Memory chip

Show me the answer

Answer: 2. CPU chip

Explanation:

• The CPU chip contains the Arithmetic Logic Unit (ALU), which is responsible for performing addition, comparison, and other arithmetic/logical operations.

98. If a particular idea can be implemented in hardware or software, the factor(s) that favor hardware implementation is/are

1. Cost-effectiveness

2. Reliability

3. Speed of operation

4. Frequent changes expected

Show me the answer

Answer: 3. Speed of operation

Explanation:

• Hardware implementation is favored when speed of operation is critical, as hardware can perform tasks faster than software.

99. Tera is 2 to the power of

1. 32

2. 40

3. 30

4. 25

Show me the answer

Answer: 2. 40

Explanation:

• Tera represents (2^{40}), which is approximately 1 trillion in decimal.

100. Von Neumann architecture is

1. SISD

2. MIMD

3. SIMD

4. MISD

Show me the answer

Answer: 1. SISD

Explanation:

• Von Neumann architecture is based on the Single Instruction, Single Data (SISD) model, where one instruction is executed at a time on a single data stream.