Get the Preplance app for a seamless learning experience. Practice offline, get daily streaks, and stay ahead with real-time interview updates.
Get it on
Google Play
4.9/5 Rating on Store
Accenture · Java
Practice Java questions specifically asked in Accenture interviews – ideal for online test preparation, technical rounds and final HR discussions.
Questions
18
Tagged for this company + subject
Company
Accenture
View company-wise questions
Subject
Java
Explore topic-wise practice
Go through each question and its explanation. Use this page for targeted revision just before your Accenture Java round.
Both must be the first statement. this(...) chains within the same class; super(...) calls parent ctor. Only one can appear, and compiler inserts implicit super() if none provided.
For complete preparation, combine this company + subject page with full company-wise practice and subject-wise practice. You can also explore other companies and topics from the links below.
Stable hashCode/equality avoids map/key corruption; no internal state changes simplify reasoning and eliminate data races.
Improves invariants and validation at a single point; reduces coupling and exposes a minimal API, easing refactoring.
Safety in sharing/caching (e.g., pool, classpath, keys) and security/thread-safety; also enables stable hash codes for map keys.
HashSet (no order), LinkedHashSet (insertion order), TreeSet (sorted).
Overloading resolved at compile-time; overriding at runtime via dynamic dispatch.
Mutations can break set/map invariants and lookup; cross-type symmetry/consistency can also be violated.
Create a checked exception to force callers to acknowledge a recoverable domain error—like a business rule violation or a missing required configuration. Create an unchecked exception when the failure indicates a programmer mistake or an unexpected state that typical callers cannot handle—like illegal arguments, null misuses, or invariant violations. Use descriptive names and include context in the message.
JRE contains the JVM and core libraries; JDK bundles JRE plus compilers and tooling.
Literals are interned in the String pool; identical literals share one instance. new String creates a distinct heap object even if an equal literal exists.
Abstract classes: partial implementation + state; interfaces: contracts of behavior; since Java 8+, interfaces can have default/static methods but no instance state.
It returns an unmodifiable view that throws on mutating operations.
Future.get() is a blocking wait. Use the timed overload to bound waiting, and handle InterruptedException, ExecutionException, or CancellationException.
Sealed types control extension points, improving maintainability and exhaustiveness checks.
Overriding allows covariant return; access cannot be narrowed; static methods are hidden, not overridden.
Unmodifiable wrappers block mutating operations on the view but do not copy data. If the backing list changes elsewhere, the view reflects those changes.
Mapping, filtering, sorting build the pipeline; collect, reduce, forEach consume it. `peek` is intermediate and `allMatch` is terminal.
serialVersionUID is a version stamp. Declaring it stabilizes compatibility decisions across builds and code changes. It has nothing to do with compression or encryption.