Which of the following systems software does the job of merging the records from two files into one?
Answer: B
Correct answer: Utility program
Merging the records of two files into one is routine housekeeping on data, and that is the province of a utility program - the sort, merge, copy and backup programs supplied with the system. Security and networking software serve other purposes entirely.
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Which language is related to database ?
Answer: B
Correct answer: Sql
SQL - Structured Query Language - is the standard language for relational databases: it defines tables, and inserts, updates, deletes and queries the rows in them. Perl, PHP and Java are general-purpose programming languages that may send SQL to a database.
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The time required for the fetching and execution of one simple machine instruction is
Answer: B
Correct answer: CPU cycle
The complete fetch–decode–execute sequence for one simple machine instruction is a CPU cycle (also called the machine or instruction cycle). Seek time is how long a disk arm takes to reach a track, and real time refers to processing that must keep pace with external events.
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One gigabyte is equal to how many megabytes ?
Answer: B
Correct answer: 1024
Each step in the traditional binary hierarchy multiplies by 1024, since \(2^{10} = 1024\). So 1024 bytes make a kilobyte, 1024 kilobytes a megabyte and 1024 megabytes a gigabyte.
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The microcomputer, Intel MCS-80 is based on the widely used Intel
Answer: A
Correct answer: 8080 microprocessor
The Intel MCS-80 was the family of chips built around the 8080 microprocessor, introduced in 1974 - an 8-bit processor with a 16-bit address bus reaching 64 KB of memory. The 8085 and the 16-bit 8086 belong to the later MCS-85 and iAPX 86 families.
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The symbols used in an assembly language are
Answer: B
Correct answer: Mnemonics
Assembly language replaces each binary operation code with a short mnemonic - MOV, ADD, JMP - chosen to remind the programmer what the instruction does, and names memory locations with symbolic labels. The assembler translates those mnemonics back into the machine code.
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A pen shaped device which can sense light, and is used to point at spots on a video screen.
Answer: B
Correct answer: Light pen
A light pen is held against the screen and its photocell detects the instant the scanning beam passes beneath it; from the timing the system works out which point was touched. It was the standard way of pointing at a spot on a display before the mouse became common.
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One million bytes of information are ?
Answer: A
Correct answer: 1 MB
One megabyte is about a million bytes - \( 10^6 \) bytes in decimal reckoning, or \( 2^{20} = 1{,}048{,}576 \) bytes when counted in the binary units the memory system uses. A kilobyte is a thousand times smaller and a gigabyte a thousand times larger.
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What is the full form of ALU in a computer’s central processing unit ?
Answer: D
Correct answer: Arithmetic Logic Unit
The Arithmetic Logic Unit performs the arithmetic and logical operations of the processor. It works alongside the control unit, which fetches and decodes instructions, and the registers, which hold the operands.
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ASCII stands for
Answer: A
Correct answer: American standard code for information interchange
ASCII is the American Standard Code for Information Interchange, a 7-bit code giving \( 2^7 = 128 \) values - the letters, digits, punctuation and control characters. Its universality is what allows text written on one machine to be read on another.
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