Skip to content

Course home

String handling operations in a programming language

String handling operations in a programming language

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869
Question 34

The subroutine EXTRACT_SUB extracts characters from a given string.

For example, EXTRACT_SUB(3, 7, 'CHROMOSOME') would return 'OMOSO'.

A sequence analysis program makes the following variable assignments:

sample_a ← 'CYTOSINE'
sample_b ← 'NUCLEOTIDE'
sample_c ← 'POLYMERASE'
sample_d ← 'CHROMOSOME'

The variable result is assigned a value using the statement:

result←EXTRACT_SUB(4,8,sample_b) \text{result} \leftarrow \text{EXTRACT\_SUB}(4, 8, \text{sample\_b}) result←EXTRACT_SUB(4,8,sample_b)

What is the value of result?

A

’LEOTI’\text{'LEOTI'}’LEOTI’

B

’EOTI’\text{'EOTI'}’EOTI’

C

’EOTID’\text{'EOTID'}’EOTID’

D

’OTIDE’\text{'OTIDE'}’OTIDE’

Markscheme

String handling operations in a programming language Questions

  1. GCSE
  2. /Computer Science
  3. /String handling operations in a programming language

89 exam-style questions on AQA GCSE Computer Science String handling operations in a programming language. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank