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ICSE Class 10 String Handling and Wrapper Classes — practice questions — page 2

Explore 96 free String Handling and Wrapper Classes questions in ICSE Class 10 Computer Applications. Open each question or exercise to read its content, reference answers and available explanation.

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String Handling and Wrapper Classes questions and exercises with answers

Showing questions 31–60 of 96.

Which class provides a mutable string alternative in Java?Read the answer and worked solution →Why are immutable strings advantageous in concurrent programming?Read the answer and worked solution →How are string functions implemented in OO languages?Read the answer and worked solution →What information does the string length function return?Read the answer and worked solution →What value does length("hello world") evaluate to?Read the answer and worked solution →What condition is evaluated by a string equality check?Read the answer and worked solution →What outcome does a string inequality comparison verify?Read the answer and worked solution →What text modification does trim or strip perform?Read the answer and worked solution →What task is carried out by the indexOf method on a string?Read the answer and worked solution →Which backward search routine does lastIndexOf mirror?Read the answer and worked solution →Which symbol appends two strings together via concatenation?Read the answer and worked solution →What algebraic properties describe string concatenation?Read the answer and worked solution →What structural subset describes both prefixes and suffixes?Read the answer and worked solution →What sequence describes the reverse of a character string?Read the answer and worked solution →What ordering system compares strings based on an alphabet?Read the answer and worked solution →Which characters commonly enclose string literals in source code?Read the answer and worked solution →Which symbol prefixes escape sequences in string literals?Read the answer and worked solution →How many bytes does a 5-character null-terminated string occupy?Read the answer and worked solution →Match wrapper pairs: 1. int: p. Integer 2. char: q. Character 3. double: r. DoubleRead the answer and worked solution →Match box actions: 1. Box: p. Wrap to obj 2. Unbox: q. Prim val 3. Auto: r. ImplicitRead the answer and worked solution →Match static parse: 1. Int: p. parseInt 2. Byte: q. parseByte 3. Long: r. parseLongRead the answer and worked solution →Match wrapper traits: 1. State: p. Immutable 2. Mem: q. Heap object 3. Kind: r. Non-primRead the answer and worked solution →Match storage forms: 1. Array: p. Primitive 2. List: q. Obj refs 3. Wrap: r. BridgeRead the answer and worked solution →Match numeric wraps: 1. Float: p. Real 32 2. Double: q. Real 64 3. Num: r. SuperclassRead the answer and worked solution →Match bool wraps: 1. bool: p. Primitive 2. Bool: q. Class obj 3. Val: r. True falseRead the answer and worked solution →Match pack origins: 1. Lang: p. Wrappers 2. Util: q. List sets 3. Math: r. BigIntegerRead the answer and worked solution →Match auto features: 1. J2SE: p. Ver 5.0 2. Auto: q. Code add 3. Gen: r. CompilerRead the answer and worked solution →Match unbox logic: 1. Fun: p. intValue() 2. Auto: q. Auto run 3. Prim: r. ExtractedRead the answer and worked solution →Match compare rules: 1. ==: p. Reference 2. Eq: q. Value check 3. Prim: r. PrimitivesRead the answer and worked solution →Match list entries: 1. Val: p. int prim 2. Box: q. Auto wrap 3. Node: r. IntegerRead the answer and worked solution →

Worked practice questions

Which class provides a mutable string alternative in Java?

  1. StringTokenizer
  2. StringComponent
  3. StringReference
  4. StringBuilder
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Correct answer: D. StringBuilder

StringBuilder provides an unsynchronized, mutable alternative to the String class.

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Why are immutable strings advantageous in concurrent programming?

  1. Faster memory freeing
  2. Zero object overhead
  3. Simpler thread safety
  4. Direct hardware access
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Correct answer: C. Simpler thread safety

Immutable strings eliminate data races across threads and simplify concurrent code.

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How are string functions implemented in OO languages?

  1. Global utility routines
  2. Methods of string objects
  3. Hardware CPU instructions
  4. External compiler plugins
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Correct answer: B. Methods of string objects

In object-oriented systems, string operations are implemented as methods of string objects.

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More Computer Applications topics

Classes, Encapsulation and ScopeArrays in Java (Single and Double Dimensional)User-Defined Methods and Constructors