PotashCorp Interview Questions and Answers

To troubleshoot hive slowness, check for resource contention, optimize queries, and monitor system performance.

• Check for resource contention such as CPU, memory, and disk usage

• Optimize queries by reducing data scanned and avoiding unnecessary joins

• Monitor system performance using tools like Ganglia or Ambari

• Consider partitioning tables to improve query performance

• Use compression to reduce disk I/O and network traffic

ZK and JN play a crucial role in ensuring high availability of Namenode in Hadoop cluster.

• ZK (Zookeeper) is used for leader election and maintaining the state of active and standby Namenodes.

• JN (JournalNode) is responsible for storing the edit logs of Namenode, which are used for recovery in case of failover.

• In case of Namenode failure, ZK helps in electing a new active Namenode from the standby Namenodes, while JN pro...read more

The primary market is where new securities are issued and sold for the first time.

• It is the market where companies raise capital by issuing new stocks or bonds.

• Investors can purchase these securities directly from the issuing company.

• Examples include initial public offerings (IPOs) and corporate bond offerings.

The secondary market refers to the financial market where previously issued securities are bought and sold.

• It is a market where investors can trade securities that have already been issued.

• It provides liquidity to investors by allowing them to buy and sell securities after their initial issuance.

• The secondary market includes stock exchanges, bond markets, and other platforms where securities are traded.

• Investors can bu...read more

Futures and options are financial derivatives that allow investors to speculate on the future price movements of an underlying asset.

• Futures contracts are agreements to buy or sell an asset at a predetermined price on a specified future date.

• Options contracts give the holder the right, but not the obligation, to buy or sell an asset at a predetermined price within a specified period.

• Both futures and options are commonl...read more

The derivative is a mathematical concept that represents the rate of change of a function at a particular point.

• The derivative measures how a function changes as its input changes

• It is defined as the slope of the tangent line to the graph of the function at a given point

• The derivative can be used to find the maximum and minimum values of a function

• It is commonly used in calculus to solve problems involving rates of cha...read more

There are several types of trade, including international trade, domestic trade, wholesale trade, and retail trade.

• International trade involves the exchange of goods and services between countries.

• Domestic trade refers to the buying and selling of goods and services within a country.

• Wholesale trade involves the sale of goods in large quantities to retailers or other businesses.

• Retail trade involves the sale of goods to...read more

Capital market deals with long-term securities while money market deals with short-term securities.

• Capital market is a market for long-term securities such as stocks, bonds, and debentures.

• Money market is a market for short-term securities such as treasury bills, commercial papers, and certificates of deposit.

• Capital market is used for raising long-term funds for investment in fixed assets.

• Money market is used for shor...read more

Changes in share purchasing and selling

• Introduction of online trading platforms

• Implementation of circuit breakers to prevent extreme price fluctuations

• Introduction of transaction taxes in some countries

• Increased use of algorithmic trading

• Regulatory changes to increase transparency and prevent insider trading

Calculation of brokerage is based on the percentage of the transaction value.

• Brokerage is calculated as a percentage of the transaction value

• The percentage may vary depending on the type of security being traded

• For example, the brokerage for equity shares may be different from that of mutual funds

• Brokerage may also be subject to a minimum and maximum limit

• The brokerage amount is deducted from the investor's account

• The ...read more