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a451 2.1.7 ocr computing

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Lavington ICT
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2.1.7 Programming

Question 1 of 15

1

An algorithm can be defined as...

Select one of the following:

  • defined set of steps that can be used to complete a task.

  • a set of steps that can be used to complete a task.

  • a random set of steps that can be used to complete a task.

  • an order of doing things correctly to complete something.

Explanation

Question 2 of 15

1

Sequence is when...

Select one of the following:

  • instructions are executed one after another.

  • instructions are executed one after another in a series.

  • instructions are executed by the user.

  • instructions are executed one after another but not always in series.

Explanation

Question 3 of 15

1

Selection is when...

Select one of the following:

  • a program will execute instructions regardless of what the use does.

  • a program will execute certain instructions based upon the users actions.

  • a program will execute certain instructions based on conditions.

  • a program will execute all instructions regardless of what the user does.

Explanation

Question 4 of 15

1

Selection statements include...

Select one of the following:

  • IF, THEN, ELSE & CASE

  • IF,ELSE & CASE

  • IF, THAN, ELSE & CASE

  • IF, THEN, ELSE, ELIF & CASE

Explanation

Question 5 of 15

1

In computer programming 'iteration' is used to...

Select one of the following:

  • loop around and around a piece of code until the correct answer is chosen.

  • loop around a piece of code until a condition is met that activates the next part of the program.

  • loop around and around a piece of code until a condition is met that ends the iteration.

  • loop twice around a piece of code until a condition is met that ends the iteration.

Explanation

Question 6 of 15

1

In programming a translator is used to convert different programming languages into machine code. There are
three types...

Select one of the following:

  • Assembler, interpreter & compiler.

  • Assembler, identifier & compiler.

  • Assembler, identifier & interpreter.

  • Compiler, identifier & interpreter.

Explanation

Question 7 of 15

1

An interpreter is a translator that converts high level languages into machine code. It does this by...

Select one of the following:

  • working three lines at a time, checking syntax, converting to machine code and executing the code.

  • working one line at a time, converting to machine code, checking syntax and executing the code.

  • working one line at a time, checking syntax, converting to machine code and executing the code.

  • working three lines at a time, converting to machine code, checking syntax and executing the code.

Explanation

Question 8 of 15

1

A compiler is a translator that converts high level programming languages into machine code. It does this by...

Select one of the following:

  • working through the whole program (source code), checking the syntax, then converting to machine code and creating an object. The object code is executed not the source code.

  • working through the whole program (source code), then converting to machine code and creating an executable object. The object code is executed not the source code.

  • working through the whole program (source code) one line at a time, checking the syntax, then converting to machine code and creating an executable object. The object code is executed not the source code.

  • working through the whole program (source code), checking the syntax, then converting to machine code and creating an executable object. The object code is executed not the source code.

Explanation

Question 9 of 15

1

An assembler translator...

Select one of the following:

  • converts assembly language programs into machine code.

  • converts programs created in any language into machine code

  • converts programs created in any high level language into machine code

Explanation

Question 10 of 15

1

Syntax is a set of rules that defines how a program statements must be written in order for the translator to understand them. A syntax error is...

Select one of the following:

  • an error in the spelling of program statements.

  • an error in the format of the program statements such as missing keywords.

  • an error in the format of the program statements such as missing semi-colons or keywords spelt incorrectly.

  • an error in the punctuation of program statements.

Explanation

Question 11 of 15

1

Logic errors in programs are...

Select one of the following:

  • errors in program statements that means the outcome is unexpected, even though the program will run.

  • errors in the algorithm that means the outcome is expected, even though the program will run.

  • errors in the algorithm that means the outcome is unexpected, even though the program will run.

  • errors in the algorithm that means the outcome returns nothing as the program will not run.

Explanation

Question 12 of 15

1

An integer is a data type that typically takes up 2 bytes of memory. Which of the following is an integer?

Select one of the following:

  • 2.6

  • "2.6"

  • 26

  • 26.0

Explanation

Question 13 of 15

1

A real number (or float) is a data type for fractional numbers that typically takes up 4 bytes of memory. Which of the
following is a real number?

Select one of the following:

  • 26

  • "26.0"

  • 260

  • 2.60

Explanation

Question 14 of 15

1

A string is a data type that typically takes up 1 byte per character. Which of the following is a string?

Select one of the following:

  • hello world

  • "!h3ll0 world4"

  • "hello w0rld

  • h3llo world"

Explanation

Question 15 of 15

1

What is the main difference between a constant and a variable?

Select one of the following:

  • A constant's value remains the same where as a variables value can change.

  • A constant's value only changes if a variables value changes.

  • A constant's value remains the same where as a variables value can be changed by the user.

  • A constant's value remains the same where as a variables value can change be changed, but only once.

Explanation

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