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SQL Interview Success: Unlocking the Top 5 Frequently Asked Queries

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 Here are the five top commonly asked SQL queries in the interviews. These you can expect in Data Analyst, or, Data Engineer interviews. Top SQL Queries for Interviews 01. Joins The commonly asked question pertains to providing two tables, determining the number of rows that will return on various join types, and the resultant. Table1 -------- id ---- 1 1 2 3 Table2 -------- id ---- 1 3 1 NULL Output ------- Inner join --------------- 5 rows will return The result will be: =============== 1  1 1   1 1   1 1    1 3    3 02. Substring and Concat Here, we need to write an SQL query to make the upper case of the first letter and the small case of the remaining letter. Table1 ------ ename ===== raJu venKat kRIshna Solution: ========== SELECT CONCAT(UPPER(SUBSTRING(name, 1, 1)), LOWER(SUBSTRING(name, 2))) AS capitalized_name FROM Table1; 03. Case statement SQL Query ========= SELECT Code1, Code2,      CASE         WHEN Code1 = 'A' AND Code2 = 'AA' THEN "A" | "A
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13 Tricky Kubernetes Os Interview Questions

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THE tricky interview questions will simplify your job search - the listed questions are in the order of basic to midlevel skills. Kubernetes is an operating system built to work on Linux distributions for the sole purpose of Kubernetes Cluster. Kubernetes 13 Tricky Kubernetes Interview Questions. These interview questions help you to recap before the interviews. Also, you can use this knowledge for your projects. 1. What is Kubernetes? Kubernetes is OS (operating system) on the cloud, which oversees the cloud-native containerized apps. It is an orchestrator, which takes care of cloud apps - updates, rollback, scale-up, scale down, maintenance, etc. 2. What are Cloud-native apps? These run on the cloud, which means on any cloud - private, public, hybrid. They also run in an on-premise datacenter. The right answer is- applications designed and written in such a way that scale up or scale down as demand rises or fallen. 3. What are Containerized apps? Containers, which have images of apps
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5 Tricky Python Interpreter Interview Questions

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Python is an interpreter, which converts to byte-code when it first encounters the .py module. It is portable. And, it is a one-time job. IN THIS PAGE Python Interpreter Interview Questions Python Interpreter 1 - What's an Interpreter? Python interpreter  converts source-code to byte-code when you first execute it is non-runnable code. The only software can process that code. During Python installation, a virtual environment will create. This environment can parse the byte code. 2 - What're the differences Between Bytecode and Machine Code? Machine code is binary that you can see in the form of 0,1s. Byte code is non-readable, only a designated software can parse it. 3 - How does Python Interpreter Work? Self-read flow chart. The smiley is byte-cod e. It uses other libraries and create byte-code. Execution flow of Interpreter 4 - When you Install Python, the list of components do you think to install? Interpreter and Libraries. Interpreter. The process of the interpreter is Bla
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10 Tricky Apache-Storm Interview Questions

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The storm is a real-time computation system. It is a flagship software from Apache foundation. Has the capability to process in-stream data. You can integrate traditional databases easily in the Storm. The tricky and highly useful interview questions given in this post for your quick reference. Bench mark for Storm is a million tuples processed per second per node. Tricky Interview Questions 1) Real uses of Storm? A) You can use in real-time analytics, online machine learning, continuous computation, distributed RPC, ETL 2) What are different available layers on Storm? Flux SQL Streams API Trident   3)  The real use of SQL API on top of Storm? A) You can run SQL queries on stream data 4) Most popular integrations to Storm? HDFS Cassandra JDBC HIVE HBase 5) What are different possible Containers integration with Storm? YARN DOCKER MESOS 6) What is Local Mode? A) Running topologies in the Local server we can say as Local Mode. 7) Where all t
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