Pak Exam MCQs

Option: A
Explanation :A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1. Although computers usually provide instructions that can test and manipulate bits, they generally are designed to store data and execute instructions in bit multiples called bytes. In most computer systems, there are eight bits in a byte. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device.
Half a byte (four bits) is called a nibble. In some systems, the term octet is used for an eight-bit unit instead of byte. In many systems, four eight-bit bytes or octets form a 32-bit word. In such systems, instruction lengths are sometimes expressed as full-word (32 bits in length) or half-word (16 bits in length).

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Pick out the wrong statement about modern computer systems

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A. Even beginners, untrained persons can safely handle them
B. it is important to understand the proper handling of each element and proper overall procedures must be followed
C. The negligent use of a computer system will almost always introduce time bombs into the system.
D. These are simple and easy to take care of

Answer & Solution

Option: A
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Real time computing is possible because of

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A. Storage capability
B. Accuracy
C. High Speed
D. Versatility

Answer & Solution

Option: C
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Pick up the correct statement about computers

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A. Computers process data with human intervention after the program has been fed
B. Computers have the built-in ability to obey different types of instructions.
C. All comparisons are made in the control section
D. The arithmetic-logic section of the CPU selects, interprets and executes the program steps.

Answer & Solution

Option: B
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Processors of all computers, whether micro, mini or mainframe must have

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A. ALU
B. Primary Storage
C. Control Unit
D. All of these

Answer & Solution

Option: D
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Pick up the false statement

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A. Computer can manipulate both numeric and non-numeric symbols
B. Computer errors can usually be traced to faulty programs or inaccurate input data
C. The facts or informational raw materials represented by numeric and non-numeric symbols are called information
D. The space in the primary storage section is divided into four areas: input, working, storage, output and program storage.

Answer & Solution

Option: C
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A computer possesses information

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A. Automatically
B. At Once
C. By Truncating
D. As directed by the operator

Answer & Solution

Option: A
Explanation :A computer possesses information automatically. Computer is an electronic machine used to solve different problems according to a set of instructions given to it. A computer can accept data, process data into useful information and store it for later use.
Computer can be used as calculating machine to produce results at very high speed but the calculation is not the only use of computer. People use computers to solve different problems quickly and easily. So computer has changed the way of life.
A computer possesses information. The processed data is called information. In other words information is an organized and processed form of data. Information is more meaningful than data and it is used for making decisions. Further, Data is used as input for the processing and information is the output of this processing. The central processing unit CPU processes data into information.
A series of steps used to convert data into useful information is called information processing cycle. Different steps in the information processing cycle are as follows:
i. Input
ii. Processing
iii. Output
iv. Storage

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Computer can’t do anything without

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A. Chip
B. Memory
C. Hard Disk
D. Program

Answer & Solution

Option: D
Explanation :A computer program is a collection of instructions that performs a specific task when executed by a computer. Most computer devices require programs to function properly.
A computer program is usually written by a computer programmer in a programming language. From the program in its human-readable form of source code, a compiler or assembler can derive machine code—a form consisting of instructions that the computer can directly execute.
There are also bad programs, called malware, written by people who want to do bad things to a computer. Some are spyware, trying to steal information from the computer. Some try to damage the data stored on the hard drive. Some others send users to web sites that offer to sell them things. Some are computer viruses or ransomware.

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